Since Punxsutawney Phil is predicting six more weeks of winter, why not give the season one last hurrah. We tracked down countless wintry pleasures worth bundling up for at 10 great national parks. Read on to find out where you can drive on an ice road, see snow beards on bison, venture out on the best ranger-led snowshoe walks, stargaze some of the country's darkest skies, and—in case you're not embracing winter—snorkel in glorious denial.